Improvement in paper-bag machines



l I 4 S11eets-sheelc L T. W. GRI-NTER.

PAPER BAG MACHINES.

Patented Nov. 7,1876.

Aft est. A Inventqr,

T. W. GRINTER.

PAPER BAG MACH:

NES.' y Patented Nov.-7, 18716 mgm.

Inventor.

stf.

fw/5mm,

4 Sheets-Sheet 4. T. W. GRINTER.

PAPER BAG MACHINES.

No .'184, o73, Patented 1m71.187s.

Inven tor.

UNITED STATES THOMAS vv. GRINTEH, oF CINCINNATI,,oHIQAssIeNoRoF cnn-,HALF His PATENTOFFICH lRIGHT TO JOSEPH F.'JEWETT, OF SAME PLACE.

IMPR'VEMNT IN'PAPER-BAG MACHINES.

speeineenon forming pere e'f Lettepe Patent Ne. 184,073, desea November 7, 181e; eppneetien mea Mey/5,1876. A Y

Tov all whom it may concern.-

Be it known that I, THOMAS W. GRINTER,

vof Cincinnati, Ohio, have invented certain Improvements in Paper-Baglubing Machines,

of which the following is aspecilcation:

My invention relates to machinery for mak `ing tubes from which is formed the Well-known Satchel-bottom paper bag; and has for its object the provision of suitable devices for'cutting alip to the tube.` Theuse of this lip is ,-twofold.` Theextended end serves as a place for catching hold of by machinery and `opening out the end'of the tube when the bottom of the bag is made (suitable mechanisms for 'which will form the subjectmatter of an -ap- Yplication for separateLetters Patent.) The depressedv part renders the bag easily opened f for use.

Obviously my improvements may be applied y in Ways varying somewhat in their details ofV construction from those representedin the accompanying drawings. l

Figure l isv a side vievvof a common tube, and shows the position of the cuttingplate and segments. Fig.2 is adongitudinal section through the cutting-plate and segments, showing the manner ot' attaching the plate,4 Aand the position of the plate and segments when the upper sideV of the lip isecut.V Fig. 3

shows the' position of the plate and segments Awhen the lower side ot' the lip is cut.4 Figs. 4

and 5 are face views of segments with knives to make a lip-cut on both sides of the tube when the remainder ofthe tube is cut at another point. Figs. 6 and 7` are face viewsot' segments, with knives for cutting the lip and severing the remainder of the tube at the same place. Fig. 8 isa view. of the tube. Fig. 9 is a top view of the cuttin g-plate and connections.;

Fig. l0 shows the manner the cutting-rollers severthe tube'when alip cut has been previ- 4ously madel on oneside of the tube only. Fig.

11 is a. section on the line w ai of Fig. l0. Fig.

-124 is a topsection of the endlesstube ot' paper,.'showing the lip-cut madefon one side ot' the paper" only. Fig. 13 shows the lip as it turns up when the cutting-knife l cuts through the other part of the tube on the line yy. Fig.

I, 14. is a longitudinal section of amaehine adapted to many sizes of bags. Fig'.15 is a side elevation of one of the segments and cutter.

The operation .of forming the paper into a tube, applying the paste, and carrying it forward being identical with that ot machines in generaluse, I deem a particular .description oi' these parts unnecessary, and will only refer to themin so far as is necessary to show the proper connection and operation of my invention. Ieither cut the lip and sever theremainder of the tube at the same point, or make rthe lip-cut 'andl sever the tube at a different lplace, both of which operations I use in a practical machine. In large `heavy bags I make the lip-cut and sever the remainder of the tube `at separate points. For lighter bags I perform tube. The papervis folded around a former, t',

and Icarried forward by the rollers d d. :Inside the tube I place aplateya, of any suitajn ble' materialpreferably rubber. It' lall the cuts areto be made at the same time, this plate `with the segments n( areplaced be# youd the rollersd di; If the cuts are tovbe made at separatepoints, I prefer placing them in front ofthe rollers d d. Passing back through a groove turned in the center of the rollers d d is a cord or small rod, b, connect` .ing the plate a Withthejstationary bar e by Vmeans ofthe spring c. The plate a lies in the center of the tube,and in the path of the-re-` volving segments an', so that at `each revolu- L tion these segmen-ts `take hold ofthe plate and ,carry it forward a short distance, then `release' .their hold, when, by the action ofthe spring` 0, itis drawn Vback again. 4'Ihe plate aisot' such size as to tillthe del,V pressed part p p of the segments a nf, Figs. 6

and 7. In the depressedpart ofthe segments are knives o o" .for cutting the lip, the shape of' the knives'determining the shape of the lip. In oneside isa straight-knife, o, cutting vin the line o f the severing-knife h; in the other one place. When cuts are made at separate parts p p of the segments a W/-match in reel A to where .thelast cut is'made. When Myo'bject-in. this way of cutting the lip is to claim devicesfor cuttingthe lip lm, Figs. '.12

side a curved.' knife, o, its yends terminating in the line yof the severing-knife h. The small knives o o' match in grooves in the plate a. The severing-knife h matches in the groove@ ofthe corresponding segment. These segments are `used when the cuts are made at places, segments shown in Figs. 4 and 5 are used Vwith knives, as shown, if a.v lip-cut is made on each side of the paper; but ifa lipcut is made on one side of the paper only, as in Figs. 12 and 13, the straight knife t of Fig. 4 is taken out, andonly the curved knife o in Fig. 5 used. i The manner of operation when the cuts are made at the same place is as follows: The paper, passing from the reel A over the pastewheel C, is drawn under the guide-wheel E and. around the former ,.and carried forward bythe rollers d d. As the plate a is inside the tube, and the knives o o in Athe depressed Igrooves in the-plate a, and the severing-knife h in the segment nfmatches inthe -groove g of the corresponding segment n', at every revolution of these segments a tube, as shown in Fig. 8, will be cut. When the tube is cut in this Way the severing-knife 'l in the rollers d d is not used.

- l If thelipfcut is made at one point and the balance of the tube severed at another, segments, a face view of which is seen in Figs. 4 and 5, are lused to cut the lip, and the tube is then cut by the knife Z inthe rollers d d'. In this caseI prefer placing the segments and plate a in front of the rollers d d. Preferablyl use only the curved knife v in thesegment, Fig. 5, thereby cutting alip, m, on one side of the paper only, as shown in'` Figs. 12 and 13. The rollerd is grooved, as shown, so that the lip m, which, being free, may turn up into the groove while the knife l cuts the other part of the tube on the line y y.-

- `In the drawings which v accompany this specification I have only exhibited the devices in position and shape-for cuttingvthe lip-after the tubeis formed. This must necessarily be the case when the tubeis all severed at once; and when the lip is out iirst,as shown in Figs. 12and 13, I lprefer that it be done as close as practical to where the other part of the tube is severed, thereby enabling me the more easily to make the last cut match with the lip-cut. But this lip may be eut by rollers, segments, or otherwise, at any pointfrom the vthe lip is c ut in the paper before it is formed into a tube, it is preferably done on the side opposite to that shown -in Figs. 12 and 13, or opposite'theseam, if oneside only is cut.

and 13, in connection with others for severing the remainder of the tube. Figs. 4 and 5 and Figs. 6 and 7 ,are different faces for the segl ments n n', Fig. 1. If the lip m iscut in the paper before being formed into a tube, it is done by a knife similar to the curved knife a, Fig. 5, matching in the groove of a corresponding roller or segment; and any shape may be given to the knife that is desired for the lip. v`When the cuts are all made at one place the segments a nmay be complete rollrepresenting some of the connections. Thefeed-rollers d d are driven in the ordinary way by belt or gearing. The segments n n 'are driven by idlers connected with the feedrollers d d or by bevel-gearing, as Vshown in Fig. l. I f

In machines requiring *changesV for many sizes of bags, I prefer'making the lip cut and severing the remainder of the tube both by means ofadjustable segments. In this case I place the segments n a for cutting the lip before the feed-rollers, and in the rear of the feed-rollers I place larger segments w w for severing the tube, as shown in Fig.- 14. On the face of one of the segments w I preferably havea cutting-bed of rubber, and in the other segment w I place a cutting-knife the same as the knife l, Figs. 10 and =11. If the lip-cut is made on both 4sides of the tube by" the knives e and t in segments n a', then, preferably, I cut away a small place in the center of the knife l immediately when the lip-cut falls.

I claim as my inventionl In a paper-bag-tubing machine, the elastic cutting-plate a, having transverse grooves, substantially as and for the purpose hereinbefore set forth.

l 2. The segments n and n, provided with cutters O O', substantially as and for the purpose described.

3. The combination, substantially as set forth, of the segments-n n and the platea, whereby the plate is clamped and carried forward while the lip is being cut and afterward released.

Y 4. The combination, substantially as set forth, ofthe spring c and rod -or cord b, the plate a, and operative segments n n', so connected as to draw it back after said plate has been carried forward and released.

5. The combination, with segments n n', substantially as set forth,.of the knives O O' for cutting the lip, and the knife /L for severing `the remainder of the tube, whereby the lip is cut and the tube severed at the same point. L

In testimony whereof I have hereunto subscribed my name. f f

THOS. W. GRINTER. Witnesses: g Y GEO. E. JEwECrCr F. E. Cowiive. 

